[Détermination, par la méthode capacitive, de la teneur en eau liquide et de la constante diélectrique dans un milieu poreux]
A capacitive sensor-based apparatus has been settled to determine the liquid water amount and dielectric constant in consolidated porous media. This technique relies on the dielectric properties of water, air, and mineral substrate. The experimental procedure is described for successively oven-dried samples at 323 K. It allows us to determine the sample dielectric constant as a function of the sample water amount. For limestones from Caen region, an affine relationship is found at 293 K. This is then compared with other empirical soils data and with existing homogeneisation techniques applied to undeformable heterogeneous dielectrics.
Un dispositif de sonde capacitive a été mis au point pour déterminer la teneur en eau liquide et la constante diélectrique dans un milieu poreux consolidé. Cette technique utilise les propriétés diélectriques de l'eau, de l'air, et du substrat minéral. Le procédé expérimental est décrit pour des échantillons séchés au four à 323 K. On peut alors évaluer la constante diélectrique de l'échantillon en fonction de sa teneur en eau. On trouve une relation affine dans le cas des pierres calcaires de Caen à 293 K. Ceci est ensuite mis en perspective avec d'autres résultats empiriques obtenus sur des sols ainsi qu'avec des modèles classiques d'homogénéisation de diélectriques hétérogènes et indéformables.
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Mots-clés : Milieux poreux, Teneur en eau, Eau interstitielle, Diélectrique, Capteur capacitif, Homogénéisation
Teddy Fen-Chong 1 ; Antonin Fabbri 1 ; Jean-Pierre Guilbaud 1 ; Olivier Coussy 1
@article{CRMECA_2004__332_8_639_0,
author = {Teddy Fen-Chong and Antonin Fabbri and Jean-Pierre Guilbaud and Olivier Coussy},
title = {Determination of liquid water content and dielectric constant in porous media by the capacitive method},
journal = {Comptes Rendus. M\'ecanique},
pages = {639--645},
publisher = {Elsevier},
volume = {332},
number = {8},
year = {2004},
doi = {10.1016/j.crme.2004.02.028},
language = {en},
}
TY - JOUR AU - Teddy Fen-Chong AU - Antonin Fabbri AU - Jean-Pierre Guilbaud AU - Olivier Coussy TI - Determination of liquid water content and dielectric constant in porous media by the capacitive method JO - Comptes Rendus. Mécanique PY - 2004 SP - 639 EP - 645 VL - 332 IS - 8 PB - Elsevier DO - 10.1016/j.crme.2004.02.028 LA - en ID - CRMECA_2004__332_8_639_0 ER -
%0 Journal Article %A Teddy Fen-Chong %A Antonin Fabbri %A Jean-Pierre Guilbaud %A Olivier Coussy %T Determination of liquid water content and dielectric constant in porous media by the capacitive method %J Comptes Rendus. Mécanique %D 2004 %P 639-645 %V 332 %N 8 %I Elsevier %R 10.1016/j.crme.2004.02.028 %G en %F CRMECA_2004__332_8_639_0
Teddy Fen-Chong; Antonin Fabbri; Jean-Pierre Guilbaud; Olivier Coussy. Determination of liquid water content and dielectric constant in porous media by the capacitive method. Comptes Rendus. Mécanique, Volume 332 (2004) no. 8, pp. 639-645. doi : 10.1016/j.crme.2004.02.028. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2004.02.028/
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